a(1) = greatest k such that H(k) - H(6) < H(6) - H(3); a(2) = greatest k such that H(k) - H(a(1)) < H(a(1)) - H(6), and for n > 2, a(n) = greatest k such that H(k) - H(a(n-1)) > H(a(n-1)) - H(a(n-2)), where H = harmonic number.
A227816
a(1) = greatest k such that H(k) - H(6) < H(6) - H(3); a(2) = greatest k such that H(k) - H(a(1)) < H(a(1)) - H(6), and for n > 2, a(n) = greatest k such that H(k) - H(a(n-1)) > H(a(n-1)) - H(a(n-2)), where H = harmonic number.
Terms
- a(0) =16a(1) =41a(2) =103a(3) =257a(4) =640a(5) =1592a(6) =3958a(7) =9839a(8) =24457a(9) =60792a(10) =151107a(11) =375596a(12) =933591a(13) =2320556a(14) =5768028a(15) =14337143a(16) =35636731a(17) =88579473a(18) =220175161a(19) =547272407a(20) =1360312788a(21) =3381224518a(22) =8404448844a(23) =20890289891a(24) =51925381404a(25) =129066913288a(26) =320811665802a(27) =797416799492
External references
- oeis: A227816